<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <meta http-equiv="X-UA-Compatible" content="ie=edge" />
  <title>技能条</title>
  <style>
    html,
    body {
      padding: 0;
      margin: 0;
      font-family: sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    ul,
    li {
      margin: 0;
      padding: 0;
    }

    main {
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100vh;
      background-color: #1e272e;
    }

    ul {
      width: 500px;
    }

    li {
      list-style: none;
      color: #d2dae2;
      font-size: 18px;
      margin: 48px 0;
      position: relative;
    }

    li::before,
    li::after {
      content: "";
      display: block;
      height: 16px;
      width: 100%;
      background-color: #1f4a59;
      position: absolute;
      bottom: -28px;
      border-radius: 6px;
    }

    li::before {
      box-shadow: 0 0 6px rgba(75, 207, 250, 0.2);
    }

    li::after {
      background-image: linear-gradient(90deg, #0fbcf9, #34e7e4);
    }

    li::after {
      animation-duration: 1.2s;
      animation-fill-mode: forwards;
      animation-timing-function: ease-in-out;
    }

    .js::after {
      animation-name: js;
    }

    .react::after {
      animation-name: react;
    }

    .html5::after {
      animation-name: html5;
    }

    .css3::after {
      animation-name: css3;
    }

    .sketch::after {
      animation-name: sketch;
    }

    @keyframes js {
      from {
        width: 0;
      }

      to {
        width: 90%;
      }
    }

    @keyframes react {
      from {
        width: 0;
      }

      to {
        width: 80%;
      }
    }

    @keyframes html5 {
      from {
        width: 0;
      }

      to {
        width: 70%;
      }
    }

    @keyframes css3 {
      from {
        width: 0;
      }

      to {
        width: 60%;
      }
    }

    @keyframes sketch {
      from {
        width: 0;
      }

      to {
        width: 50%;
      }
    }
  </style>
</head>

<body>
  <main>
    <ul>
      <li class="js">JavaScript</li>
      <li class="react">React</li>
      <li class="html5">HTML5</li>
      <li class="css3">CSS3</li>
      <li class="sketch">Sketch</li>
    </ul>
  </main>
</body>

</html>